Kinetics of the Electro‐Oxidation of Sulfite Catalyzed by Copper Ion

1989 ◽  
Vol 136 (1) ◽  
pp. 101-108 ◽  
Author(s):  
Akira Katagiri ◽  
Takaharu Matsubara ◽  
Hajime Arai ◽  
Katsuya Toyoda ◽  
Zenichiro Takehara
Keyword(s):  
Copper Ion ◽  
Electro Oxidation ◽  
Kinetics Of

Kinetics of reconstitution of apotyrosinase by copper

1990 ◽  
Vol 68 (2) ◽  
pp. 476-479
Author(s):  
Donald C. Wigfield ◽  
Douglas M. Goltz
Keyword(s):  
Rate Constant ◽  
Copper Concentration ◽  
Copper Ions ◽  
Copper Ion ◽  
Order Rate Constant ◽  
First Order ◽  
Order Rate ◽  
Pseudo First Order ◽  
Rate Limiting ◽  
Kinetics Of

The kinetics of the reconstitution reaction of apotyrosinase with copper (II) ions are reported. The reaction is pseudo first order with respect to apoenzyme and the values of these pseudo first order rate constants are reported as a function of copper (II) concentration. Two copper ions bind to apoenzyme, and if the second one is rate limiting, the kinetically relevant copper concentration is the copper originally added minus the amount used in binding the first copper ion to enzyme. This modified copper concentration is linearly related to the magnitude of the pseudo first order rate constant, up to a copper concentration of 1.25 × 10−4 M (10-fold excess), giving a second order rate constant of 7.67 × 102 ± 0.93 × 102 M−1∙s−1.Key words: apotyrosinase, copper, tyrosinase.

scholarly journals Calcium PretreatedHevea brasiliensisSawdust for Copper Removal: Batch and Column Study

2015 ◽  
Vol 2015 ◽  
pp. 1-9
Author(s):  
Swarup Biswas ◽  
Umesh Mishra
Keyword(s):  
Adsorption Capacity ◽  
Adsorption Process ◽  
Copper Ion ◽  
Packed Bed ◽  
Isotherm Models ◽  
Batch Adsorption ◽  
Maximum Adsorption Capacity ◽  
Packed Bed Column ◽  
Pseudo Second Order ◽  
Kinetics Of

Calcium pretreatedHevea brasiliensissawdust has been used as an effective and efficient adsorbent for the removal of copper ion from the contaminated water. Batch experiment was conducted to check the effect of pH, initial concentration, contact time, and adsorbent dose. The results conclude that adsorption capacity of adsorbent was influenced by operating parameters. Maximum adsorption capacity found from the batch adsorption process was 37.74 mg/g at pH of 5.6. Various isotherm models like Langmuir, Freundlich, and Temkin were used to compare the theoretical and experimental data, whereas the pseudo-first-order, pseudo-second-order, and intraparticle diffusion models were applied to study the kinetics of the batch adsorption process. Dynamic studies were also conducted in packed-bed column using different bed depths and the maximum adsorption capacity of 34.29 was achieved. Characterizations of the adsorbent were done by Fourier transform infrared spectroscopy, scanning electron microscope, and energy dispersive X-ray spectroscopy.

Mechanistic insight into active chlorine species mediated electrochemical degradation of recalcitrant phenolic polymers

RSC Advances ◽  
2014 ◽  
Vol 4 (104) ◽  
pp. 59821-59830 ◽  
Author(s):  
S. Sundarapandiyan ◽  
T. Shiny Renitha ◽  
J. Sridevi ◽  
B. Chandrasekaran ◽  
P. Saravanan ◽  
...  
Keyword(s):  
Active Chlorine ◽  
Electrochemical Degradation ◽  
Mechanistic Insight ◽  
Electro Oxidation ◽  
Kinetics Of ◽  
Insight Into

Degradation of recalcitrant phenolic syntan by electro-oxidation was investigated. The kinetics of mineralization of phenolic syntan was followed both in terms of TOC and COD measurements.

Leaching Kinetics of Vanadium with Electro-oxidation and H2O2 in Alkaline Medium

2016 ◽  
Vol 30 (9) ◽  
pp. 7802-7807 ◽  
Author(s):  
Hao Peng ◽  
Zuohua Liu ◽  
Changyuan Tao
Keyword(s):  
Alkaline Medium ◽  
Leaching Kinetics ◽  
Electro Oxidation ◽  
Kinetics Of

ChemInform Abstract: Mechanism of the Electro-Oxidation of Sulfite Catalyzed by Copper Ion.

ChemInform ◽  
2010 ◽  
Vol 27 (1) ◽  
pp. no-no
Author(s):  
A. KATAGIRI ◽  
H. ARAI ◽  
Z. TAKEHARA
Keyword(s):  
Copper Ion ◽  
Electro Oxidation
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